6809 Opcode Map
                                       ===============
                           http://mdfs.net/Docs/Comp/6809/OpCodeMap
                    Author: J.G.Harston - Update: 0.10 - Date: 02-Mar-2007

       0/8        1/9        2/A        3/B        4/C        5/D        6/E        7/F
   +----------+----------+----------+----------+----------+----------+----------+----------+
00 |NEG  <dp  |neg  <dp  |neg/com<dp|COM  <dp  |LSR  <dp  |lsr  <dp  |ROR  <dp  |ASR  <dp  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
08 |ASL  <dp  |ROL  <dp  |DEC  <dp  |dec  <dp  |INC  <dp  |TST  <dp  |JMP  <dp  |CLR  <dp  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
10 |*** 10 ***|*** 11 ***|NOP       |SYNC      |          |          |LBRA rel16|LBSR rel16|
   +----------+----------+----------+----------+----------+----------+----------+----------+
18 |          |DAA       |ORCC #imm |          |ANDCC #imm|SEX       |EXG  r0,r1|TFR  r0,r1|
   +----------+----------+----------+----------+----------+----------+----------+----------+
20 |BRA  rel  |BRN  rel  |BHI  rel  |BLS  rel  |BCC  rel  |BCS  rel  |BNE  rel  |BEQ  rel  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
28 |BVC  rel  |BVS  rel  |BPL  rel  |BMI  rel  |BGE  rel  |BLT  rel  |BGT  rel  |BLE  rel  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
30 |LEAX idx  |LEAY idx  |LEAS idx  |LEAU idx  |PSHS regs |PULS regs |PSHU regs |PULU regs |
   +----------+----------+----------+----------+----------+----------+----------+----------+
38 |cwai      |RTS       |ABX       |RTI       |CWAI #imm |MUL       |reset     |SWI       |
   +----------+----------+----------+----------+----------+----------+----------+----------+
40 |NEGA      |nega      |coma      |COMA      |LSRA      |lsra      |RORA      |ASRA      |
   +----------+----------+----------+----------+----------+----------+----------+----------+
48 |ASLA      |ROLA      |DECA      |deca      |INCA      |TSTA      |clra      |CLRA      |
   +----------+----------+----------+----------+----------+----------+----------+----------+
50 |NEGB      |negb      |comb      |COMB      |LSRB      |lsrb      |RORB      |ASRB      |
   +----------+----------+----------+----------+----------+----------+----------+----------+
58 |ASLB      |ROLB      |DECB      |decb      |INCB      |TSTB      |clrb      |CLRB      |
   +----------+----------+----------+----------+----------+----------+----------+----------+
60 |NEG  idx  |neg  idx  |com  idx  |COM  idx  |LSR  idx  |lsr  idx  |ROR  idx  |ASR  idx  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
68 |ASL  idx  |ROL  idx  |DEC  idx  |dec  idx  |INC  idx  |TST  idx  |JMP  idx  |CLR  idx  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
70 |NEG  >ext |neg  >ext |com  >ext |COM  >ext |LSR  >ext |lsr  >ext |ROR  >ext |ASR  >ext |
   +----------+----------+----------+----------+----------+----------+----------+----------+
78 |ASL  >ext |ROL  >ext |DEC  >ext |dec  >ext |INC  >ext |TST  >ext |JMP  >ext |CLR  >ext |
   +----------+----------+----------+----------+----------+----------+----------+----------+
80 |SUBA #imm |CMPA #imm |SBCA #imm |SUBD #imm |ANDA #imm |BITA #imm |LDAA #imm |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
88 |EORA #imm |ADCA #imm |ORAA #imm |ADDA #imm |CMPX #imm |BSR  rel  |LDX  #n16 |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
90 |SUBA <dp  |CMPA <dp  |SBCA <dp  |SUBD <dp  |ANDA <dp  |BITA <dp  |LDAA <dp  |STAA <dp  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
98 |EORA <dp  |ADCA <dp  |ORAA <dp  |ADDA <dp  |CMPX <dp  |JSR  <dp  |LDX  <dp  |STX  <dp  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
A0 |SUBA idx  |CMPA idx  |SBCA idx  |SUBD idx  |ANDA idx  |BITA idx  |LDAA idx  |STAA idx  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
A8 |EORA idx  |ADCA idx  |ORAA idx  |ADDA idx  |CMPX idx  |JSR  idx  |LDX  idx  |STX  idx  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
B0 |SUBA >ext |CMPA >ext |SBCA >ext |SUBD >ext |ANDA >ext |BITA >ext |LDAA >ext |STAA >ext |
   +----------+----------+----------+----------+----------+----------+----------+----------+
B8 |EORA >ext |ADCA >ext |ORAA >ext |ADDA >ext |CMPX >ext |JSR  >ext |LDX  >ext |STX  >ext |
   +----------+----------+----------+----------+----------+----------+----------+----------+
C0 |SUBB #imm |CMPB #imm |SBCB #imm |ADDD #imm |ANDB #imm |BITB #imm |LDAB #imm |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
C8 |EORB #imm |ADCB #imm |ORAB #imm |ADDB #imm |LDD  #n16 |          |LDU  #n16 |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
D0 |SUBB <dp  |CMPB <dp  |SBCB <dp  |ADDD <dp  |ANDB <dp  |BITB <dp  |LDAB <dp  |STAB <dp  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
D8 |EORB <dp  |ADCB <dp  |ORAB <dp  |ADDB <dp  |LDD  <dp  |STD  <dp  |LDU  <dp  |STU  <dp  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
E0 |SUBB idx  |CMPB idx  |SBCB idx  |ADDD idx  |ANDB idx  |BITB idx  |LDAB idx  |STAB idx  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
E8 |EORB idx  |ADCB idx  |ORAB idx  |ADDB idx  |LDD  idx  |STD  idx  |LDU  idx  |STU  idx  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
F0 |SUBB >ext |CMPB >ext |SBCB >ext |ADDD >ext |ANDB >ext |BITB >ext |LDAB >ext |STAB >ext |
   +----------+----------+----------+----------+----------+----------+----------+----------+
F8 |EORB >ext |ADCB >ext |ORAB >ext |ADDB >ext |LDD  >ext |STD  >ext |LDU  >ext |STU  >ext |
   +----------+----------+----------+----------+----------+----------+----------+----------+


                                        *** PAGE 10 ***
       0/8        1/9        2/A        3/B        4/C        5/D        6/E        7/F
   +----------+----------+----------+----------+----------+----------+----------+----------+
20 |LBRA rel16|LBRN rel16|LBHI rel16|LBLS rel16|LBCC rel16|LBCS rel16|LBNE rel16|LBEQ rel16|
   +----------+----------+----------+----------+----------+----------+----------+----------+
28 |LBVC rel16|LBVS rel16|LBPL rel16|LBMI rel16|LBGE rel16|LBLT rel16|LBGT rel16|LBLE rel16|
   +----------+----------+----------+----------+----------+----------+----------+----------+
30 |          |          |          |          |          |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
38 |          |          |          |          |          |          |          |SWI2      |
   +----------+----------+----------+----------+----------+----------+----------+----------+

   +----------+----------+----------+----------+----------+----------+----------+----------+
80 |          |          |          |CMPD #n16 |          |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
88 |          |          |          |          |CMPY #n16 |          |LDY  #n16 |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
90 |          |          |          |CMPD <dp  |          |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
98 |          |          |          |          |CMPY <dp  |          |LDY  <dp  |STY  <dp  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
A0 |          |          |          |CMPD idx  |          |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
A8 |          |          |          |          |CMPY idx  |          |LDY  idx  |STY  idx  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
B0 |          |          |          |CMPD >ext |          |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
B8 |          |          |          |          |CMPY >ext |          |LDY  >ext |STY  >ext |
   +----------+----------+----------+----------+----------+----------+----------+----------+
C0 |          |          |          |          |          |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
C8 |          |          |          |          |          |          |LDS  #n16 |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
D0 |          |          |          |          |          |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
D8 |          |          |          |          |          |          |LDS  <dp  |STS  <dp  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
E0 |          |          |          |          |          |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
E8 |          |          |          |          |          |          |LDS  idx  |STS  idx  |
   +----------+----------+----------+----------+----------+----------+----------+----------+
F0 |          |          |          |          |          |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
F8 |          |          |          |          |          |          |LDS  >ext |STS  >ext |
   +----------+----------+----------+----------+----------+----------+----------+----------+


                                        *** PAGE 11 ***
       0/8        1/9        2/A        3/B        4/C        5/D        6/E       7/F
   +----------+----------+----------+----------+----------+----------+----------+----------+
38 |          |          |          |          |          |          |          |SWI3      |
   +----------+----------+----------+----------+----------+----------+----------+----------+

   +----------+----------+----------+----------+----------+----------+----------+----------+
80 |          |          |          |CMPU #n16 |          |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
88 |          |          |          |          |CMPS #n16 |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
90 |          |          |          |CMPU <dp  |          |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
98 |          |          |          |          |CMPS <dp  |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
A0 |          |          |          |CMPU idx  |          |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
A8 |          |          |          |          |CMPS idx  |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
B0 |          |          |          |CMPU >ext |          |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+
B8 |          |          |          |          |CMPS >ext |          |          |          |
   +----------+----------+----------+----------+----------+----------+----------+----------+

Notes
-----
   #imm   - 8bit immediate number
   #n16   - 16bit immediate number
   #n32   - 32bit immediate number
   <dp    - 8bit direct page address
   >ext   - 16bit absolute address
   rel    - 8bit relative offset
   rel16  - 16bit relative offset
   regs   - register map
   idx    - indexed addressing mode, see next table
   r0,r1  - next byte contains <r0:r1>
   Opcodes in lower case in the above list are 'undocumented'.

register map: b7  b6  b5  b4  b3  b2  b1  b0
 pushed last/ PC  S/U  Y   X  DP   B   A  CC pushed first/
 popped first                                popped last

   r0,r1: 0 D    4 S      8 A    12 -
          1 X    5 PC     9 B    13 -
          2 Y    6 -     10 CC   14 -
          3 U    7 -     11 DP   15 -

Indexed (idx) addressing mode
-----------------------------
Specified by a post-byte, after the opcode and before any additional data.

  postbyte data      assembler        postbyte data      assembler
  0rrnnnnn           n,R           |
  1rr00000           ,R+           |  1??10000
  1rr00001           ,R++          |  1rr10001           [,R++]
  1rr00010           ,-R           |  1??10010
  1rr00011           ,--R          |  1rr10011           [,--R]
  1rr00100           ,R            |  1rr10100           [,R]
  1rr00101           B,R           |  1rr10101           [B,R]
  1rr00110           A,R           |  1rr10110           [A,R]
  1??00111                         |  1??10111
  1rr01000 nn        n,R           |  1rr11000 nn        [n,R]
  1rr01001 hh ll     n16,R         |  1rr11001 hh ll     [n16,R]
  1??01010                         |  1??11010
  1rr01011           D,R           |  1rr11011           [D,R]
  1xx01100 nn        n,PCR         |  1xx11100 nn        [n,PCR]
  1xx01101 hh ll     n16,PCR       |  1xx11101 hh ll     [n16,PCR]
  1??01110                         |  1??11110
  1??01111                         |  10011111 hh ll     [n16]
                                   |  10111111
                                   |  11011111
                                   |  11111111
  rr=00,01,10,11 for R=X,Y,U,S

Other notes
-----------
The only difference between the 6809 and the 6809e is the pinouts. The
instruction set is the same:
  6809:  Halt, XTAL, >EXTAL, Reset, MRDY, Q, E, DMA/BREQ
  6809e: Halt, TSC,  LIC,    Reset, AVMA, Q, E, Busy

The 6309 is a further develpment by Hitatchi with more instructions and
registers.

The 68xx series are bigendian, that is, multibyte values are stored in
memory with the most significant byte first.